c# 读写文件

        private void button1_Click(object sender, EventArgs e)

        {

            FileStream rfs,wfs;

            StreamWriter sw;

            StreamReader sr;

            //FileStream stream = new FileStream(@"E:mxh20141013addr111.csv", FileMode.Open);

            //StreamReader reader = new StreamReader(stream, Encoding.GetEncoding("gb2312"));

            rfs = new FileStream(@"E:mxh20141013addr111.csv", FileMode.Open);

            sr = new StreamReader(rfs, Encoding.GetEncoding("gb2312"));

            wfs = new FileStream(@"E:mxh20141013addr222.txt", FileMode.Create, FileAccess.Write);

            sw = new StreamWriter(wfs,Encoding.GetEncoding("gb2312"));

            string sLine = "";

            string[] myList;

            while (sLine != null)

            {

                sLine =sr.ReadLine();

                if (sLine != null)

                {

                    myList = sLine.Split(',');

                    sw.WriteLine("企业名称： "+myList[0]);

                    sw.WriteLine("发件地址： "+myList[1]);

                    sw.WriteLine("收件人： " + myList[2]);

                    sw.WriteLine();              

                }

            }

            sw.Close();

            wfs.Close();

            sr.Close();

            rfs.Close();

            Close();

        }